bug#36918: 26.2.90; calendar: the chinese sexagesimal name for month is wrong

[Zhang Haijun]

> p C (calendar-chinese-print-date) describes 2019-08-05 as follows:
> 
>  Cycle 78, year 36 (Ji-Hai), month 7 (Ren-Shen), day 5 (Jia-Xu)
> 
> and a quick online search revealed two websites[1][2] which give a
> similar description:
> 
>  Ji Hai Year (4717), Ren Shen Month (7), Jia Xu Day (5)
> 
> [1]: https://www.travelchinaguide.com/intro/focus/calendar.htm

At the tail of the article in this 
page(https://www.travelchinaguide.com/intro/astrology/60year-cycle.htm), it 
says:

 * The Gregorian year is approximate here. The accurate division is the 
Beginning of Spring (first of the 24 Solar Terms), although some online 
calendars adopt Chinese New Year as the division.

It mentions two division methods. The former is right (at the moment the 
ecliptic longitude is 315°). It differs too much with the latter(the first day 
of the first month), maybe saveral days like in this month(8 days).


> [2]: https://www.prokerala.com/general/calendar/chinese-year-converter.php
> 

The result in this page shows the month is Xin-Wei which is right:

https://www.prokerala.com/general/calendar/chinesecalendar.php


There are two seperated systems (or two calendars) in Chinese calendar. One of 
them is the 60-Year Cycle, which is the topic of this thread. It is standalone 
with the rest of Chinese calendar. It is a solar calendar. It is fully based on 
the 24 Solar Terms and has no relation with the rest of Chinese calendar. It is 
not commonly used. It is mainly used for scrying.